Sewing-machine motor



March 2 1926., 1,574,745

E. N. ANKETELL SEWING MACHINE MOTOR Filed June 10, 1919 :s sheets-sheet 1 March 2 1926.

E. N. ANKETELL SEWING MACHINE MOTOR Filed June 1o, 1919 3 Sheets-Sheet 2 March 2 1926. 11,574,745

E. N. ANKETELL SEWING MACHINE MOTOR Filed June l0, 1919 Patented Man 2, 1925.

entrati staring EDWARD N. ANKETEEL, oENEw nAvEN, CoNNECTIvCUnA'ssIGNoa To THE A. C. ern- EERT COMPANY, or NEW HAVEN, CONNECTICUT, A CORPORATION or CONNECTI- sawmanaceim time;

GUT.

Appncation area :alie 1e; rara. semi Nb. 303,142'.

To ZZ -wzom at may concern.'

Be it known that I, EDWARD N'. ANKETC'ELL, a citizen of the United States, residing in New Haven, county of New Haven, and State of Connecticut, have invented vcertain new and useful Improvements in. Sewing- M'achine Motors, of which ,the following is a full, clear, and exact description. I

This invention relates to electric motors for driving sewing machines and the like, and it pertains more especially to a motor driving attachment applicable tohv'ario'us makes of sewing machines. The invention has particular reference to that class of devices wherein the electric motor drives the hand wheel of the sewing machine by means of a drive pulley on the motor shaft rictionally engaging Said wheel; and. in some phases of the invention, the latternis particularly concerned with `a sewing machine driving attachment involving a motor member or unit, which can be readily detached from the sewing machine, when desired, and used for various other purposes` such as mixing beverages, operating a massage vibrator, etc.

One of the primary objects of the invention is to furnish an attachment whichV can be applied to existing sewing machines of many different makes in a ready and con-V venient manner. 4 v

Another object is to provide a simple and eiiicient motor attachment of the portable type, which can be used equally well `with machines of different patterns having the usual differences in the diameter of the hand wheel, the length and height of the head, and other differences.

I also .have in view the provision ofla simpliiied and improved type of motor driven sewing machine wherein the motor member can be readily moved out bf its cooperative relation with the hand wheel when said motor member is not in use into a location wherein.' it is conveniently stored away or accommodated until further use is required of it. This feature is of `special advantage inthe case of a dropf hea-d may chine, because when the vmotor member` is moved out of4 the operative position into the inoperative position, it `is located 1 or accommodated vsubstantially within the lines of the sewing machine headh'so that` the latter. can be `mapped into' or hoisd in motor the sewing machine table in the usual manner. yIn the particular embodiment selected for illustration, the power driving me`chaiiism is also detachable from the machine head, as above intimated, but while this is important in certain aspects of the invention, it is unimportant in other aspects. I To these and lother ends the invention consists' in the novel features and combinations ofparts to be hereinafter described and In the accompanying drawings:

Fig'. l is a fragmentary rear elevation of a sewing machine structure embodying my im-proi'feinents.v In this view, the stored away position-of the motor member is indicated in dotted lines. A

Fig. Q is a top plan view of the parts shown in Fig. 1. y y

Fig. 3 is a fragmentary end elevation of the machine head. Fig. l is an elevation ofthe att-aching 'frame or bracket, the machine headand the member being shown in dotted lines. `Fig. 5 is a section on 5-5 of Fig. 4t; and l I I Fig. 6 Vis a detail of the bracket or trame detached fronrthe other parts. y

In the drawings, I have shown one einbodiment of my invention applied `te sewing machine o'i well-known itype having a head only partially shown, and 'the usual machine wheel or hand wheel 21 fixed to the customaryshaft 22, which has abea'ring in the end of the head as usual. At the wheel end of the head,A the latter has the ordinary standard or pedestal 20a, which extends upwardly from `the customary metal bed plate 23. At the top of the standardor pedestal is the usual lateral extension or arm 20, which carries the presser bar and needle bar (not shown). In the particular oim shown, a motor driving attachment including an electric motor membei' Qayis detachably secured to the machine head by means Oia reiiiovabletrame member or' bracket 25 located alongside the pedestal 20 'in `the space between the arm 2O1a and the bed 'plate The traineor bracket 25 `carries a swinging elbow lever Q6 movable iii a vertical plane and provided at its lower part with an arm or extension 27 onwhich the body en casing ofthe mo# 'the machine wheel with .extending` flange vhardened prongs 32 on the elbow portion, 1s provided with a sleeve motor member' has a` shaft 28 carrying:r a drive pulley 29 adapted to engage the machine wheel 2l frictionally for drivingi the same. The motor member can be swung upwardly to engageits drive pulley with the proper amount of friction and can be held in'that position by means of a set screw 30 on the frame or bracket 25, pressing against a portion of the lever a6, as hereinafter described. The motor member 2/l is preferably located at the rear of the machine head, as shown, that is, at the rside away from the operator and substantially behind theupper portion of the pedestal the drive pulley 29 being engaged with the hand wheel at the lower rear portion thereof, as shown in rl`his particular location is not, however, essential in all cases.

Referring now to the detail structure, it will be observed that the frame or bracket is in the form of a plate, whichmay be conveniently cast with a Curvedlaterally extending upper end 3l forming a sert of saddle abutting against the under portion of the arm`20J adjacentits junction with the pedestal. The bracket or frame 25 is detachably clamped in place between the arm and the bed plate23, and for this purpose the upper end or saddle portion of the plate is provided with hardened metal prongs 32,'which are adapted to be forced against the under portion of the arm by means of a clamping screw at the lower part of the plate cooperating-with the bed 23. The screw 33 has a` threaded shank engaging a threaded socket `in a' laterally cast integral with the bracket plate at itslowerend, and said screw at its lower extremity is provided with a hardened point adapted to bite into the upper surface of the bed 23. .ln order to attach the bracket or frame to the machine head in the manner shown, it is fitted into the space between the arm 20 and the bed in the relation indicated in Fig. 4, and the screw 3?) is then screwed down as far as possible in its socket so as to wedge the bracket tightly in place. The

bracket, in connection with the hardened' pointed end of the screw 33, effectively prevent the dislocationof the bracket member when it has been positioned on the machine head in the simple manner explained.

At the rear edge of the bracket member, 4die same has an integral laterally extending tubular socket portion 36, which forms a part .of the pivotal mounting" for the .mo-

tor supporting .lever 2G. This lever, at its 37 having an opening' registering with a threaded socket 3S, in the end of the socket portion or extension 36, and a screw 39 passes, throughlihe Sleeve and .longitudinal .Yertcally directed threaded into the socket 38 for the purpose ot holding the lever 26 on the bracket member in such a manner that said lever is free to swingin a vertical plane. rlhe screw 39 has a suitable manipulating1 head, and between said head and the sleeve 37, a helical spring 40 is interposed, the' function of which is to hold the sleeve 3? yieldingly against the socketed extension 36.

The lower arm, of the elbow lever 26 is provided with a lateral extension directed rearwardly and horizontally, and on the arm 4l the motor supporing extension or arm 27,.previously mentioned, is adjustably mounted. By referring to Fig. l, it will be seen that one end of lthe arm 27 is provided with a fork 42, which straddlcs the arm lll from above, and a clamping,PA screw 43 having,` a threaded shank engaging a threaded socket in one of the arms ofthe fork enables the extension arm 2i to be clamped tightly to the arm 4l in the desired location. ln this manner, provision is made for adj listing the motor member 2lin a forward and rearward direction, that is, toward and away from the rear face of the machine head. This adjustment is desirable in order that the drive pulley of the motor member can be engaged with machine wheels of different diameters within certain limits. ln Fig. 3, one of the adjustments of the arm 2T, with its attached motor member, is vshown in full lines, and another adjustment suital'ilcv for a machine wheel of larger vdiameter indicated in dotted lines.

In order to permit the drive pulley to be brought into transverse alignment with the machine wheel, regardless of the distance ofthe wheel from the pedestal, within certain limits, the motor member 24 is adjustable longitudinally of the arm 27. One longitudinal adjustment of the motor member relatively to said arm is shown in full lines in Fig'. l and another adjustment is shown by the dotted lines. The motor member is secured on the arm 27 by means of parallel lugs el. cast integral with the motor easing and extending downwardly therefrom at the lower portion thereof on opposite sides of the arm 27. The motor member, in effect, straddles the arm 27 from above. A clampiup` bolt 45 cxtendine` between the two lugs beneath the arm 2T and provided with a wing' nut enables the motor member to be tightly clamped on the arm 2'? in the desired adjustment, as will be obvious.

The adjustment controlling screw 30, previously mentioned, is screwed upwardly into a sleevelike socket l? projectingrearwardlyy Afrom an arm or extension 4-8 on bracket 25 romewhat below the socketed extension 36. The rear end ofthe arm or extension 48 is enlarged to form. the sleeve 47 which has a socket 4;?) for the screw 30, and the socket 4T is preferably split transversely by a kerf 50, which tends to prevent displacement of the screw 3G, `ex

cept when the latter is manipulated for ad'- justing` purposes. The upper end of the screw 3() bears against the upper arm of the n'iotor-carrying elbow lever A25. arm is designated 5l, land vat its extremity, the lower portion thereof is abutted by the upper end of the clai'nping screw 30, which controls and limits the swinging' movement of the motor-carrying arm 27. The screw 30 can be used for holding, the motor-carrying` arm in the desired position, and it can be used for giving said arm a positive upward adjusting movement. `When the screw 8O is screwed upwardly in its socket, its upper end engages the arm 5l and swings the elbow lever 26 about the axis of the screw 39, so as to swing, the left hand end (Fig. l) of the arm 2? in an upward direction to a corresponding extent and thereby carry the drive pulley into engagement lwith the rim of the machine wheel. TWhen the screw 3Q is turned in the opposite direction, the arm 27 will move downwardly by gravity, as will be obvious, so as to disengage the machine wheel r so as to decrease the friction between the pulley and said wheel.

The,operation of my device will be obvious for the most part from. the foregoing description. The screw 30 supports the motor carrying arm in approximately horizontal position and prevents the motor member from swinging downwardly .away from the machine wheel to any considerable extent. The provisions permitting adjustment of the motor member laterally and longitudinally relatively to the machine wheelL axis have already been described. lt will be obvious that the attachment can be quickly applied to machines of different makes and quickly adjusted, so that the motor member will drive the machine wheel by friction in an efiicient manner, the degree of friction being` controlled by the screw 30. The driving; mechanism can also be detached quickly and readily, as will be obvious. The attachment, as herein described, is applicable to sewing machines having different dimensions and it can be applied to existing machines by unskilled persons without the necessity of altering the construction of such machines in any way. In other words, it is' not necessary 'to drill holes or the like in the machine head for the application of my attachment.

ln case the driving mechanism is used on a drop-head machine, it is not necessary to remove such mechanism when the head is to be dropped. At such time, the motor member is moved to the right (Fig. l) so as to draw the drive-pulley clear of theinachine wheel, and thereupon the motor member can be swung in a clockwise direction into the lQsitiol Slioi'l Cl'tl lill-t? in l, in

rlhis upper which position it is stored away substantially within Vthe lines of the machine head. ii/'lien the motor member is in this-position, there iis nothing to interfere with the dropping 'of the head into the space provided for the same in the machine table, as customary in drop-head machines. lt will be understood, of course, that while the screw 30 limits the downward swinging' movement of the motor member it does not interfere with the swinging movement which is required to shift the motor member to the stored away position just indicated. In

moving said mem-ber to the position shown y in dotted lines at the right of Fig. l, the supporting arm structure carrying the motor and mounted on the bracket member 25 is swung,` upwardly yand then downwardly until the drive pulley engages the bed plate 23 of the machine. In the particular example shown, the motor member in being shifted to the stored away position can be swung in a continuous motion through an arc of Vmore than 1800, the center of which coincides with Y the axis of the pivoted screw 39.

Various chances can be made in the details of the construction without departure from the scope of the invention, as set forth in the claims.` For example, in some aspects of the invention it is noti important that the driving mechanism be detachably applied to the machine head, Iand in other phases of the invention it is not essential that the 'arms 27 and Ll-loexist as separate arms capable of relative adjustment. Various changes in these and other respects may be made without departing` from the broad principles involved.

1What I claim is: Y

l. The combination with sewing` machine head having`- a wheel at one end, of a mot-or member having a shaft with a friction drive pulley tii'ereon, and means mount-V ing` said motor member so that it is movable in an approximately vertical plane upwardly into engagement with the lower portion of the machine wheel, and non-yielding,- means for varying' the friction between the drive pulley and the machine wheel.

2. rlhe combination with a sewing' machine head h'avinp; a wheel at one end, cf a motor member having: a drive pulley for engagingv` said wheel frictionally, a mounting for said motor member supporting the same for swinging;` movement about a horizontal axis without the motor ciu r socthat said drive wheel engages the lower portion of the rim of the machine wheel, and means for detachably securing said mounting to the machine head.

3. The combination with a sewing inachine head having a wheel, of a motor member having a drive pulley for engaging the rim of said .vheel frictionally, an arm "applied 'to the het@ @iid mounted to Swing in -an approximately vertical plane, and means for securing said motor member on said arm 'so that the drive pulley engages the lower portion of the rim of said wheel below the horizontal plane of the center of the latter, said motor member being movable to the engaged position in a substantially upward direction.A

Ll. The combination with a sewing machine head havinga wheel, of a motor inember having a drive pulley for. driving` said wheel, an arm carrying said motor member, means mounting said arm pivotally on the machine head at a point substantially below the horizontal plane of the wheel center so that the motor member is movable in a substantially upward direction into driving position, and means for holding the motor member in the driving position.

5. The combination with a sewing machine head having a wheel,of a motor member having a drive pulley fordriving said wheel, an arm carrying said motor member, means mounting said arm pivotally on the machine head at a point substantially below the horizontal plane of the wheel center so that the motor member is movable in a substantially upward direction into driving position, and means for holding the motor member in the ydriving position, said last named means being adjustable to vary the driving action.

6. The combination with a sewing machine head having a wheel, of a motor member for driving said wheel rictionally, and means for mounting said motor member in a plane below, said wheel axis including a supporting arm for said motor member secured thereto and directed lengthwise or" the head at the rear of the latter, and means for securing said arm on the head so that it is movable in an approximately vertical plane to carry the motor member into and out of the operative position, the motor member being movably mounted on said arm.

7. The combination with a sewing machine having a wheel, of a motor member having a pulley for engaging said wheel rictionally to drive the same, and means for mounting said motor member in a plane below said wheel axis including a supporting arm for said motor member directed substantially longitudinally or' the head at the rear thereof and having a pivotal mounting whereby said arm is movable in an approximately vertical plane, and means 'for lsecuring said pivotal mounting detachably to the sewing machine head, the motor member being movably mounted on said arm.

8. The combination with a sewing :machine head having a Wheel, of a mot-or member having a drive pulley for said wheel frictionally, means upon said head mounting said motor member below engaging said wheel axisso that it is movable to carry said drive pulley upwardly into engagement with said wheel, and means for giving the motor member a positive upward adjusting movement.

9. The combination with a sewing machine head having a wheel, of a motor member, mounted on said head, having a drive pulley forV engaging the lower part of said wheel frictionally, and positively acting means for moving the motor member toward the wheel so that the drive pulley will engage the latter with the desired amount of friction.

l0. The combination with a sewing machine head having a wheel, of a motor member having a drive pulley for engaging the lower part of said wheel rictionally, means upon said head for mounting said motor member swingingly relatively to said wheel, and positively acting means for holding the drive pulley against the wheel.

l1.v The combination with a sewing machine head having a wheel, of a motor member having a drive pulley for engaging said wheel frictionally, means upon said head tor mounting said motor member swlingingly relatively to said wheel, and positively and upwardly acting means i'or holding the drive pulley against the wheel, said last named means being adjustable to vary the degree of rictional contact.

l2. The combination with a sewing machine head having a wheel, of a motor member having a drive pulley fon engaging said wheel frlictionally, means mounting said motor member for swinging movement relatively to said wheel, and means comprising a vertical adjusting screw for holding the drive pulley in engagement with said wheel in a positive manner and preventing it from moving away from said wheel.

13. The combination with a machine having a head and wheel, ot a motor member having a drive pulley for frictionally engaging said machine wheel to drive the same, means comprising a vertical adjusting screw for forcing said drive pulley into engagement vwith the machine wheel and controlling the irictional engagement between said parts.

14. The combination with a machine having a head and wheel, of a motor member having a drive pulley for frictionally engaging said machine wheel to drive the same, and means comprising a vertical adjusting` screw -for forcing said drive pulley into cngagement with the machine wheel and controlling the rictional engagement between said parts, said motor member being mov-- able substantially.upwardly linto the engaged position.

l5. A. sewing machine driving attachment, comprising a motor member, a sup-- porting frame therefor, and means for selill) curing. the supporting frame to, the machine headA between the sewing machine; armY and the bed plate.

16. A sewing. machine driving attachment,A con'iprilsing): a motor member, supaortinff trame for the same and`v` means 'lorl detachably securing the supPOrting frame in the space between the sewing` machine arm and bed plate.

17. A sewing machine driving; attachment, comprising,` a motor member, a supporting trame therefor, and;v means Jfor securing the supporting trame along` side the pedestal ot the sewing machine head and beneath the sewing` machine arm. l

18. n. sewing;` machine driving attachment, con'iprising; a motor member, a supporting frame therefor, and means ior detachably securing said supporting" frame to the machine head along side the machine pedestal and in the space between the sewing` machine arm and the bed plate ot the machine.

i9. A sewingl machine driving attachment, comprising a motor-,supporting trame, and wedging means for securing said trame in the space between the sewing machine arm and the bed plate. y

20. A sewing` machine driving' attachment, comprising;I a motor suppor ing` frame., and adjustable wedgiing means for wedging said frame within the outlines of the sewing machine head.

21. A sewing` machine driving attachment, comprising a motor supporting Jframe, and means -for securing said frame tightly in place between the laterally extending sewing machine arm and the bed plate.

A sewing' machine driving attachment, comprising a supporting trame, and means comprising an adjustable screw, for wedging the same in place between the sew-- ing machine arm and the bed plate oi the machine.

3. In combination with a sewing machine head having a bed plate, and a lateral arm above the bed plate, a 'frame detachably interposed between said arm and bed plate.

2li. ln combination with a sewing niachine head vhaving a bed plate, and a lateral arm above the bed plate, a member detachably interposed between said arm and bed plate, and a motor tor driving the machine mounted on said member.

25. In combination with a sewing,l machine head having a bed plate, and a lateral arm above said bed plate, said head also having a wheel, a trame wedged in place. between the arm and bed plate, and a motor member supported on said frame for driving,` the machine wheel.

26. In combination with a sewing; machine head having a pedestal and a lateral arm, said head also having a wheel, a motor member for driving the wheel, and a suppalting member ter said meter member 10,-. catedk at the inner side. ot thepedestal beheath. the arm.

2,7'-- lin combination chine l'ie'ad; bevi Wach the wheel is mouated.:7L and a laterally tal-, motormemlfl having; a drivel pulley -for engagingr theymachine wheel frictionally, a supporting ,member for said motor member, and means for detachablysecuring d supportingnielnber in engagement with the pedestal and arm.

28. The combination with a sewing machine having a wheel, of a motor member having a pulley for driving said wheel frictionally, and means for mountingsaid niowi-th a sewingA maai a wheel, ,a pedestal on.,

extending arm at the tQp Qfthe pedestor member for longitudinal movement in an approximately vertical plane,rsaid motor member also being swingable away from the machine wheel into a stored position substantially within the lines of the sewing,` machine head.

29. The combination with a sewing machine having a wheel, ofan arm on the head directed substantially lengthwise thereoi and adapted to swing inan approximately vertical plane, and a motor member for driving the wheel adjustably mounted upon said arm and movable with the latter in a downward direction to a stored away position.

'30. rllhe combination with a sewing, machine having a wheel, oi a motor member having a pulley for driving said wheel :trictionally, a swinging arm on the head ad apted to swing in an approximately vertical plane and carryingr said motor member, said motor member being` adjustably mounted on said arm and movable upwardly to envgage said drive pulley with the lower portion of the machine wheel, and said motor member being swingable upwardly an'l downwardly when the drive pulley is withdrawn from the machine wheel7 'for the purpose of moving` said motor member downwardly to a stored away position adjacent the bed plate olE the sewing machine.

3i. A sewing machine driving` attachment, comprising a swinging supporting arm, a n'iounting` therefor, and a motor member on said arm adjustable longitudinally thereof.

32. A sewing' machine driving` attachment, comprising;` a swinging supporting;`

arm, a mounting therefor, a motor member slidable lengthwise along said arm, and means for securingI said motor member in the desired longitudinal adjust-ment.

33. A sewing,- machine driving` attachment, comprising a swinging supporting` arm, a motor member slidable lengthwise on said arrn, means for securing the motor member in the desired longitudinal adjustment, a frame 0n which said arm is mounted, and an adjusting screw on the frame cooperating with the arm.

34. A sewing machine driving attachment, comprising a swinging supporting arm, a motor member slidable lengthwise on said arm, means for securing the motor member in the desired longitudinal adjust ment, a frame on which said arm is mounted, and an adjusting screw on the frame cooperating with the arm7 said swinging arm being limited in its movement in one direction by said screw, but being movable freely away from the screw in the other direction to'carry the motor member to a stored away position.

35. In a motor attachment for sewing, and like machines having a drive wheel, a motor supporting member pivotally mounted adjacent the drive Wheel and a motor member slidably mounted on said support.

In Witness whereof, I have hereunto set my hand on this 7th day of June, 1919.

EDIVARD N. ANKETELL. 

